Episode 1
Mordecai fears of being embarrassed by his mother when C.J. wants to come over for a family dinner.
Episode 2
After breaking off his friendship with Hi-Five Ghost over an embarrassing video, Muscle Man tells Mordecai and Rigby the story of how he and Hi-Five Ghost met back in high school when he was the big man on campus — until new kid Hi-Five Ghost comes in and usurps his title.
Episode 3
C.J. competes in a mini-golf tournament to win a card that permits people to cut in line at their favorite restaurant, but things hit a snag when C.J. has to compete against her overly-competitive father.
Episode 4
The park workers tell scary stories to keep Muscle Man awake while driving to visit his mother on Halloween.
Episode 5
Episode 6
Muscle Man gives the group a list of things that he wants to do before "the end." When everyone realizes he is serious, they decide to make Muscle Man's final wishes come true.
Episode 7
Feeling unappreciated, Rigby quits his job at the park and gets a job with a moving company.
Episode 8
Rigby plans to surprise Eileen by setting up her new flat screen TV for her, but things take a turn when Eileen's roommate interferes.
Episode 9
Rigby suspects that Thomas is a Russian Spy, and when he finds out that it's true, it's up to him, Mordecai, and Benson to save the park from the KGB.
Episode 10
Episode 11
The park guys plan revenge on Muscle Man for giving them prank gifts every year during their White Elephant Gift Exchange.
Episode 12
Margaret returns to town for Eileen's Christmas party, which complicates things for Mordecai now that he is with C.J. -- and things get worse when Mordecai breaks C.J.'s heart.
Episode 13
Following the events of "Merry Christmas Mordecai," Mordecai tries to make things right with C.J. with the help of a shirtless street saxophonist, but each of his solutions make things worse.
Episode 14
Benson is invited to a park managers' luncheon by Gene, but his employees worry that it might be a trap.
Episode 15
Mordecai and Rigby are accidentally sent to Australia, so they have to look for a way to get to the airport, or else their boss Benson will have them fired for being late.
Episode 16
After his stockbroker is arrested on fraud charges, Muscle Man and Starla compete on a game show where couples compete to win an all-expenses-paid wedding.
Episode 17
Mordecai, Rigby, C.J., and Eileen head to the beach to watch the sea turtles hatch and head into the ocean, but they stumble upon a beachside resort where the wealthy are using turtles in their spas as a fountain of youth.
Episode 18
Mordecai, Rigby, Muscle Man, Hi-Five Ghost, and their boss Benson set out to stop an impending war coming from a new format, DVD.
Episode 19
Mordecai and Rigby are determined to win a happy birthday song contest so they can get a year's supply of cake.
Episode 20
Benson finds a suit in the park and begins wearing it to command respect - only to learn that the government made the suit, and corrupt leaders and business people will stop at nothing to get it.
Episode 21
Mordecai, Rigby and their boss Benson set out to find a rare video game patch from a old video game.
Episode 22
Mordecai tries to avoid further relationship problems when he attends Margaret's 1000th chopper flight party for her father.
Episode 23
An alien pod crashes onto Earth and an alien horse known as Party Horse turns to Mordecai and Rigby to help him pass a U.S. History test.
Episode 24
The group tries to find different ways to keep the park open when Mr. Maellard announces his plans to shut down the park due to lack of attendance.
Episode 25
After Mordecai and Rigby crash their cart into the garage door, they have to replace it with help from Pops and the Eggscellent knight, or their boss Benson will have them fired.
Episode 26
In an homage to all things mecha anime, Mordecai and Rigby have to get rid of a cassowary in the park, which turns into an epic battle over merchandising rights when the baby ducks and full-grown geese return to enlist the help of the park workers to defeat a pair of lawyers and their iron-clad contracts.
Episode 27
Episode 28
After the events of "1000th Chopper Flight Party", C.J. comes over to forgive Margaret for what happened then (and what happened on "Merry Christmas, Mordecai") and invites her on a double date with her and Mordecai. The trouble is, Margaret lied about havin a boyfriend so she could calm C.J. down from her rage and must keep up the masquerade with the help of Eileen and Rigby's outlandish story of how they met.
Episode 29
Mordecai and Rigby fight with the power of death-kwon-do to help Sensei obtain a new stomach for his much need stomach transplant. But Sensei's trainee, Jimmy, wants it to himself.
Episode 30
Mordecai and Rigby have to remember all of their food challenges so that they can eat a 10ft sandwich.
Episode 31
The group helps Muscle Man and Starla on their wedding day. Still, it's Mordecai, whose relationship is in danger when Margaret gets invited, and an awkward speech leads to a final falling-out between Mordecai and CJ.
